[WIP] Hadolint recommendations#41
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TokisanGames wants to merge 3 commits intogodotengine:mainfrom
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TokisanGames
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Mar 19, 2020
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| CMD mkdir -p /root/xcode && \ | ||
| clang -O3 -llzma -lxar -I /usr/local/include pbzx.c -o pbzx && \ | ||
| mkdir -p /root/xcode && \ |
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Merge into run command. Separate CMD w/ json format
TokisanGames
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Mar 19, 2020
| ln -sf /usr/bin/g++-8 /usr/bin/g++ && \ | ||
| apt-get clean && \ | ||
| rm -rf /var/lib/apt/lists/ && \ | ||
| rm ./*.deb |
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clean up files on the layer that installs them
TokisanGames
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Mar 19, 2020
| wget https://download.mono-project.com/repo/ubuntu/pool/main/m/msbuild/msbuild-sdkresolver_16.3+xamarinxplat.2019.08.08.00.55-0xamarin2+ubuntu1604b1_all.deb && \ | ||
| wget https://download.mono-project.com/repo/ubuntu/pool/main/n/nuget/nuget_5.2.0.6090.bin-0xamarin1+ubuntu1604b1_all.deb && \ | ||
| dpkg -i --force-all *.deb && \ | ||
| dpkg -i --force-all ./*.deb && \ |
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avoid files that begin with - from being interpreted as an option
TokisanGames
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Mar 19, 2020
| ARG mono_version | ||
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| RUN if [ -z "${mono_version}" ]; then echo -e "\n\nargument mono-version is mandatory!\n\n"; exit 1; fi && \ | ||
| SHELL ["/bin/bash", "-o", "pipefail", "-c"] |
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script stops if either side of a pipe fail
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In spite of what hadolint says, Making this one WIP while I figure it out. |
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I ran http://github.com/hadolint/hadolint per calinou. This resulted in 45 best practices warnings. I fixed all except for using WORKDIR instead of cd, and pinning apt-get installs (and dnf) to specific versions).
Key takeaways:
|should haveSHELL ["/bin/bash", "-o", "pipefail", "-c"]before RUN so it will fail if either side of the pipe fails.*.debshould begin with./*.debin case a file begins with a hyphen so it's not interpreted as an option.-eonechois not a POSIX standard and printf is recommended.CMDis a json list, so should be formatted asCMD ["/bin/bash"]